气固两相流速度及质量流量的静电测量法研究

介绍了一种气固两相流速度及质量流量的静电测量方法，实现了静电法在气固两相流速度及质量流量测量中的应用．通过特殊设计的静电传感器系统，利用气固两相流中固相微粒的荷电信号直接测量两相流的速度和质量流量．速度测量采用互相关分析的方法得到静电信号相移时间，计算出固相速度；通过实验确定静电传感器上静电信号电压有效值与已知两相流质量流量的关系，建立了系统电压一质量流量曲线．实验结果表明，静电测量方法可准确跟踪并测量气固两相流的固相速度，实现两相流的在线无损检测．

Measurement of the velocity and mass flow rate in gas-solid flow with electrostatic method

Electrostatic method measuring the velocity and mass flow rate in gas solid flow was introduced. The measurement of the velocity and mass flow rate were realized by an electrostatic sensor system detecting the electrostatic signals of solid powder in the gas solid flow in this method. The transit time of powder was measured by cross correlating electrostatic signals, and the velocity calculated. By correlating the voltage on electrostatic sensor and the fixed mass flow rate, the Voltage Mass flow rate curve of sensing system can be established. The key problem of electrostatic measurement was the electrostatic sensor. A feasible method of system design and experiment system applied to the measurement of velocity and mass flow rate was introduced. It is concluded that electrostatic method can be used to trace and measure the speed of the solid phase, also the method realised the on line measurement of the mass flow rate of the gas solid flow.